Marine diesel engine starting protection method

Abstract

The invention discloses a marine diesel engine starting protection method and belongs to the field of diesel engines. The marine diesel engine starting protection method can protect a diesel engine starter against long-time large-current supply, effectively avoid the condition that the starter is burnt down or damaged due to heat emitting, and effectively protect the starter against gear rolling caused by secondary starting; meanwhile, by combining the pre-supply process into the starting process, the starting process of the marine diesel engine is simplified, and it is ensured that the dieselengine is started after being fully lubricated; besides, an emergency starting button (SB2) is additionally arranged, and a starting protection contact is connected in a starting circuit in series, in other words, normal starting can be achieved in the situation of a failure of a staring button or a starting relay; and meanwhile, under the arrangement of a layer variant conduction contact, the situation that conduction of the circuit becomes poor as oxidation caused by conduction heat emitting is effectively relieved, the sensitivity of a whole starting protection logic control unit is effectively improved accordingly, and the effect of starting protection of the diesel engine is achieved.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a starting protection method for a marine diesel engine. Background technique [0002] Marine diesel engines have high thermal efficiency, good economy, easy starting, and great adaptability to various ships. They were used as propulsion power for ships soon after they came out. By the 1950s, diesel engines had almost completely replaced steam engines in newly built ships. Marine diesel engines have been the main power for civilian ships, small and medium-sized ships and conventional submarines. Marine diesel engines can be divided into main engine and auxiliary engine according to their role in the ship. The main engine is used as the propulsion power of the ship, and the auxiliary engine is used to drive the generator, air compressor or water pump, etc. [0003] Marine diesel engines are generally divided into high-speed, medium-speed and low-speed diesel engines. The main perf...

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Problems solved by technology

[0006] In the existing technology, the pre-supply process and the starting process are operated separately. If the user directly starts the diesel engine without pre-supplying lubricating oil in order to save trouble, it will have an impact on the life of the diesel engine, and most of them consider limiting the length of the starting time. Use a single method such as adding a time relay to limit the starting time, without considering the problem of the second start of the gear. The general method is to start the delay after the start button is released. If the delay is 5s, if the diesel engine does not stop completely after 5s. Stable, at this time the second start will inevitably hit the gear, and at the same time when the logic controller is used for start protection, only one start button is left, and it is not considered that the diesel engine cannot be started in case the start button fails or the start relay fails. Very scary for ships

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